Building KataGo on macOS

This is still a draft

~/opt/usr/local/cmake/cmake-3.27.1/bin/cmake . \
  -DUSE_BACKEND=OPENCL \
  -DBUILD_DISTRIBUTED=1 \
  -DLIBZIP_INCLUDE_DIR_ZIP=$HOME/opt/usr/local/libzip/1.10.1/include \
  -DLIBZIP_INCLUDE_DIR_ZIPCONF=$HOME/opt/usr/local/libzip/1.10.1/include \
  -DLIBZIP_LIBRARY=$HOME/opt/usr/local/libzip/1.10.1/lib/libzip.dylib \
  -DOPENSSL_ROOT_DIR=$HOME/opt/usr/local/libressl/ \
  -DCMAKE_INSTALL_PREFIX=$HOME/opt/usr/local/katago